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arXiv 2006.02749cond-mat.mes-hall
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二维三角晶体中的反常平面霍尔效应

Anomalous Planar Hall Effect in Two-Dimensional Trigonal Crystals

Raffaele Battilomo, Niccoló Scopigno, Carmine Ortix

摘要:

平面霍尔效应(PHE)是在存在共面电场和磁场的情况下出现的平面内横向电压。其标志是特征性的$π$ -周期性,即即使在磁场反转下,与横向电压的角度依赖性在电场和磁场对齐时完全消失。在这里,我们表明,在二维三角晶体塞曼引起的非平凡的Berry曲率效应产生一个以前未知的异常PHE是奇数的磁场和独立的相对角度与驱动电场。我们进一步表明,当一个额外的镜像对称部队的横向电压消失的线性响应制度,反常PHE可以发生作为二阶响应在零和两倍的频率的所施加的电场。我们证明,这种非线性PHE具有反对称量子贡献,源于塞曼诱导的Berry曲率偶极子。

英文摘要:

The planar Hall effect (PHE) is the appearance of an in-plane transverse voltage in the presence of coplanar electric and magnetic fields. Its hallmark is a characteristic $π$-periodic, i.e. even under a magnetic field reversal, angular dependence with the transverse voltage that exactly vanishes when the electric and magnetic fields are aligned. Here we demonstrate that in two-dimensional trigonal crystals Zeeman-induced non-trivial Berry curvature effects yield a previously unknown anomalous PHE that is odd in the magnetic field and independent of the relative angle with the driving electric field. We further show that when an additional mirror symmetry forces the transverse voltage to vanish in the linear response regime, the anomalous PHE can occur as a second-order response at both zero and twice the frequency of the applied electric field. We demonstrate that this non-linear PHE possesses an antisymmetric quantum contribution that originates from a Zeeman-induced Berry curvature dipole.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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